From: Brandon Williams <bmwill@google.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>
Cc: git@vger.kernel.org, "Junio C Hamano" <gitster@pobox.com>,
"Jeff King" <peff@peff.net>,
"Jeffrey Walton" <noloader@gmail.com>,
"Michał Kiedrowicz" <michal.kiedrowicz@gmail.com>,
"J Smith" <dark.panda@gmail.com>,
"Victor Leschuk" <vleschuk@gmail.com>,
"Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>,
"Fredrik Kuivinen" <frekui@gmail.com>
Subject: Re: [PATCH 08/29] grep: add tests for --threads=N and grep.threads
Date: Thu, 11 May 2017 11:36:40 -0700 [thread overview]
Message-ID: <20170511183640.GD83655@google.com> (raw)
In-Reply-To: <20170511091829.5634-9-avarab@gmail.com>
On 05/11, Ævar Arnfjörð Bjarmason wrote:
> Add tests for --threads=N being supplied on the command-line, or when
> grep.threads=N being supplied in the configuration.
>
> When the threading support was made run-time configurable in commit
> 89f09dd34e ("grep: add --threads=<num> option and grep.threads
> configuration", 2015-12-15) no tests were added for it.
>
> In developing a change to the grep code I was able to make
> '--threads=1 <pat>` segfault, while the test suite still passed. This
> change fixes that blind spot in the tests.
>
> In addition to asserting that asking for N threads shouldn't segfault,
> test that the grep output given any N is the same.
>
> The choice to test only 1..10 as opposed to 1..8 or 1..16 or whatever
> is arbitrary. Testing 1..1024 works locally for me (but gets
> noticeably slower as more threads are spawned). Given the structure of
> the code there's no reason to test an arbitrary number of threads,
> only 0, 1 and >=2 are special modes of operation.
>
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
> t/t7810-grep.sh | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/t/t7810-grep.sh b/t/t7810-grep.sh
> index daa906b9b0..561709ef6a 100755
> --- a/t/t7810-grep.sh
> +++ b/t/t7810-grep.sh
> @@ -775,6 +775,22 @@ test_expect_success 'grep -W with userdiff' '
> test_cmp expected actual
> '
>
> +for threads in $(test_seq 0 10)
> +do
> + test_expect_success "grep --threads=$threads & -c grep.threads=$threads" "
> + git grep --threads=$threads . >actual.$threads &&
> + if test $threads -ge 1
> + then
> + test_cmp actual.\$(($threads - 1)) actual.$threads
> + fi &&
> + git -c grep.threads=$threads grep . >actual.$threads &&
> + if test $threads -ge 1
> + then
> + test_cmp actual.\$(($threads - 1)) actual.$threads
> + fi
> + "
> +done
> +
Is there a test condition to require PTHREADS? Otherwise this might
break if git is compiled with NO_PTHREADS.
--
Brandon Williams
next prev parent reply other threads:[~2017-05-11 18:36 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-11 9:18 [PATCH 00/29] Easy to review grep & pre-PCRE changes Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 01/29] Makefile & configure: reword inaccurate comment about PCRE Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 02/29] grep & rev-list doc: stop promising libpcre for --perl-regexp Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 03/29] test-lib: rename the LIBPCRE prerequisite to PCRE Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 04/29] log: add exhaustive tests for pattern style options & config Ævar Arnfjörð Bjarmason
2017-05-12 4:48 ` Junio C Hamano
2017-05-13 18:02 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 05/29] grep: add a test asserting that --perl-regexp dies when !PCRE Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 06/29] grep: add a test for backreferences in PCRE patterns Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 07/29] grep: change non-ASCII -i test to stop using --debug Ævar Arnfjörð Bjarmason
2017-05-11 18:31 ` Brandon Williams
2017-05-11 18:35 ` Ævar Arnfjörð Bjarmason
2017-05-11 20:05 ` Brandon Williams
2017-05-11 9:18 ` [PATCH 08/29] grep: add tests for --threads=N and grep.threads Ævar Arnfjörð Bjarmason
2017-05-11 18:36 ` Brandon Williams [this message]
2017-05-11 19:22 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 09/29] grep: amend submodule recursion test for regex engine testing Ævar Arnfjörð Bjarmason
2017-05-12 4:59 ` Junio C Hamano
2017-05-13 17:33 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 10/29] grep: add tests for grep pattern types being passed to submodules Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 11/29] grep: add a test helper function for less verbose -f \0 tests Ævar Arnfjörð Bjarmason
2017-05-12 5:06 ` Junio C Hamano
2017-05-13 11:33 ` Ævar Arnfjörð Bjarmason
2017-05-15 1:29 ` Junio C Hamano
2017-05-11 9:18 ` [PATCH 12/29] grep: prepare for testing binary regexes containing rx metacharacters Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 13/29] grep: add tests to fix blind spots with \0 patterns Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 14/29] perf: add a GIT_PERF_MAKE_COMMAND for when *_MAKE_OPTS won't do Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 15/29] perf: emit progress output when unpacking & building Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 16/29] perf: add a performance comparison test of grep -G, -E and -P Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 17/29] perf: add a performance comparison of fixed-string grep Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 18/29] grep: catch a missing enum in switch statement Ævar Arnfjörð Bjarmason
2017-05-11 20:08 ` Brandon Williams
2017-05-11 20:40 ` Stefan Beller
2017-05-11 20:50 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 19/29] grep: remove redundant regflags assignment under PCRE Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 20/29] grep: remove redundant `regflags &= ~REG_EXTENDED` assignments Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 21/29] grep: factor test for \0 in grep patterns into a function Ævar Arnfjörð Bjarmason
2017-05-11 20:15 ` Brandon Williams
2017-05-11 20:22 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 22/29] grep: change the internal PCRE macro names to be PCRE1 Ævar Arnfjörð Bjarmason
2017-05-11 20:10 ` Brandon Williams
2017-05-11 9:18 ` [PATCH 23/29] grep: change internal *pcre* variable & function names to be *pcre1* Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 24/29] grep: move two functions to avoid forward declaration Ævar Arnfjörð Bjarmason
2017-05-11 20:14 ` Brandon Williams
2017-05-11 20:20 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 25/29] test-lib: add a PTHREADS prerequisite Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 26/29] pack-objects & index-pack: add test for --threads warning Ævar Arnfjörð Bjarmason
2017-05-11 20:17 ` Brandon Williams
2017-05-11 20:34 ` Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 27/29] pack-objects: fix buggy warning about threads Ævar Arnfjörð Bjarmason
2017-05-11 9:18 ` [PATCH 28/29] grep: given --threads with NO_PTHREADS=YesPlease, warn Ævar Arnfjörð Bjarmason
2017-05-11 20:21 ` Brandon Williams
2017-05-11 20:33 ` Ævar Arnfjörð Bjarmason
2017-05-11 20:43 ` Brandon Williams
2017-05-11 21:20 ` [PATCH] C style: use standard style for "TRANSLATORS" comments Ævar Arnfjörð Bjarmason
2017-05-11 21:41 ` Jonathan Nieder
2017-05-11 21:50 ` Brandon Williams
2017-05-12 5:20 ` Johannes Sixt
2017-05-30 16:02 ` Jiang Xin
2017-05-30 23:03 ` Junio C Hamano
2017-05-11 9:18 ` [PATCH 29/29] grep: assert that threading is enabled when calling grep_{lock,unlock} Ævar Arnfjörð Bjarmason
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